How to iterate over php error and continue while loop? - php

Question

I am using the following code to parse definitions from a remote website , according to the usernames in my database. I am using simple html dom parser.
//database connection
include 'db.php';
//display errors
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
include 'simple_html_dom.php';
//select usernames order alphabetically
$row = mysqli_query($conn, "SELECT user_name FROM (
SELECT *
FROM store
ORDER BY user_id DESC)
AS store ORDER BY user_id ASC");
//echo out definitions of usernames
while($lastusers = mysqli_fetch_array($row)) {
echo '<br>' . $lastusers["user_name"];
echo '<br>Definition:<br>';
$html = file_get_html("https://www.merriam-webster.com/dictionary/" . $lastusers["user_name"]);
$title = $html->find("div.card-primary-content", 0)->innertext;
echo $title;
//save definitions to corresponding username
$save = mysqli_query($conn, 'UPDATE store
SET def = $title,
WHERE user_name = $lastusers["user_name"]'
)
}
My while loop will begin to generate the definitions per username , until certain pages are not found resulting in an error that stops the loop.
Warning:
file_get_contents(https://www.merriam-webster.com/dictionary/colourings):
failed to open stream: HTTP request failed! HTTP/1.0 404 Not Found in
/app/simple_html_dom.php on line 75 Fatal error: Call to a member
function find() on boolean in /app/test.php on line 18
My question is how to skip over the username that throws the error and continue the loop? Also because their are over 500 usernames , this operation is very intensive , so i'm saving the definitions , and would like to avoid the errors being saved to the database.

Answer 1

You can suppress the warning like shown in the following link
How can I handle the warning of file_get_contents() function in PHP?
Or an other alternative is to write a custom error handler. See this link
PHP: How to use set_error_handler() to properly deal with all errors except notices?